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Tephroite

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GMN119288

Tephroite

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Description
Locality: 
Valea Untului, Cugir, Alba County, Romania
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 2 × 2.5 cm
Description

Manganese silicate from Romania.
The specimen is a massive brownish tephroite. (!)

Mineral Data
What's on the rock

Tephroite

Formula: 
Mn2+2SiO4
Strunz: 
9.AC.05
Crystal System: 
Orthorhombic Forms short prismatic crystals.
Hardness: 
6.0
Streak: 
Pale gray
Type Locality: 
Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA

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